Unearthing Mars (UP)

Story related, cannot be missed!

This is the action stage of the game. You’ll be fighting an invading force with a gun and shield. The gun is fired by pressing and can be charged by holding to do a more damaging shot. The shield can block the fire from the small enemies. To take out the three large enemies (two walkers and a flyer), you’ll need to utilize the charge feature and shoot for the middle of their bodies at the red circle that fires back at you.

You are likely to lose your shield to the first of the three big enemies and will need to be quick in killing both walkers as they can wipe you out quickly. The flyer is not terribly dangerous as long as you shoot down its projectiles, so when it and the second walker are on screen the walker and the projectiles should be your focus.